Feeling guilty of weaning

I will be returning to work on Tuesday. I feel really guilty of weaning my son off BM. It's just that I can no longer keep up with this BF & pumping session because I find myself loosing so many nights of sleep that it interferes with myself being able to function like a normal person. Not only I choose to wean him it's due to my hour commute that I'll be doing every day & starting a stressful job! I've battled depression all my life & going thru this process of trying to dry up milk supply has got me feeling really emotional.